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  • Geert Uytterhoeven's avatar
    arm64: renesas: Enable PM and PM_GENERIC_DOMAINS for SoCs with PM Domains · 2ee98234
    Geert Uytterhoeven authored
    
    
    All supported Renesas ARM64 SoCs have clock and power domains. To ensure
    proper operation of on-SoC modules, module clocks must be ungated, and
    power domains must be powered up when needed.
    
    Currently the user can choose to build a kernel with power management
    enabled or disabled:
      - If CONFIG_PM=y, power domains and/or module clocks are handled
        dynamically by Runtime PM and the generic power domain.
      - If CONFIG_PM=n, power domains are assumed to be powered up by reset
        state or by the boot loader, and module clocks are handled by the
        legacy clock domain on driver (un)bind.
        The latter is implemented using a platform bus notifier, which
        applies not only to all on-SoC devices, but to all platform devices
        present in the system.
    
    To remove the dependency on implicit assumptions, and to get rid of the
    peculiarities of the legacy clock domain, enable CONFIG_PM and
    CONFIG_PM_GENERIC_DOMAINS unconditionally.
    
    Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
    Signed-off-by: default avatarSimon Horman <horms+renesas@verge.net.au>
    2ee98234